/Engine/Plugins/FX/Niagara/Source/Niagara/Public/NiagaraPreviewGrid.h
[UFUNCTION](Programming/UnrealArchitecture/Reference/Functions)(BlueprintCallable, BlueprintImplementableEvent, CallInEditor, Category="Niagara|Preview") void SetSystem ( [UNiagaraSystem](API\Plugins\Niagara\UNiagaraSystem) * InSystem )